/* OEM search */
.os-body { padding: 2.5rem 0 4rem; }
.os-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2rem;
    align-items: start;
}
@media (max-width: 1024px) {
    .os-layout { grid-template-columns: 1fr; }
}

.os-search-box {
    background: linear-gradient(135deg, var(--ink), #1a2820);
    border-radius: var(--radius-lg);
    padding: 2rem 2rem 1.75rem;
    margin-bottom: 2rem;
    color: #fff;
    box-shadow: 0 16px 48px rgba(14,20,18,.18);
}
.os-search-box h2 {
    font-size: 1.15rem; font-weight: 800; margin-bottom: .35rem;
}
.os-search-box > p {
    font-size: .88rem; color: rgba(255,255,255,.6);
    line-height: 1.6; margin-bottom: 1.35rem;
}
.os-form { display: flex; flex-direction: column; gap: 1rem; }
.os-input-row {
    display: flex; flex-wrap: wrap; gap: .75rem;
}
.os-oem-input {
    flex: 1; min-width: 240px;
    padding: 1rem 1.15rem;
    border: 2px solid rgba(255,255,255,.12);
    border-radius: var(--radius);
    background: rgba(255,255,255,.06);
    color: #fff;
    font: 600 1.05rem/1.2 'Outfit', ui-monospace, monospace;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.os-oem-input::placeholder {
    color: rgba(255,255,255,.35);
    font-weight: 500;
}
.os-oem-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(206,254,36,.25);
}
.os-oem-input.invalid { border-color: rgba(220,80,80,.6); }
.os-oem-input.valid { border-color: var(--accent); }
.os-submit {
    padding: 1rem 1.75rem;
    border: none; border-radius: 999px;
    background: var(--accent); color: #272824;
    font: inherit; font-weight: 700; font-size: .95rem;
    cursor: pointer; white-space: nowrap;
    transition: filter .2s;
}
.os-submit:hover { filter: brightness(1.06); }
.os-submit:disabled {
    opacity: .45; cursor: not-allowed; filter: none;
}
.os-hint {
    font-size: .8rem; color: rgba(255,255,255,.5);
    min-height: 1.25em;
}
.os-hint.err { color: #f0a0a0; }
.os-hint.ok { color: #8fd4b0; }

.os-examples {
    display: flex; flex-wrap: wrap; gap: .5rem;
    margin-top: .25rem;
}
.os-example {
    padding: .4rem .75rem; border-radius: 999px;
    border: 1px solid rgba(255,255,255,.18);
    background: rgba(255,255,255,.05);
    color: rgba(255,255,255,.8);
    font: inherit; font-size: .76rem; font-weight: 600;
    cursor: pointer; font-family: ui-monospace, monospace;
}
.os-example:hover { border-color: var(--accent); color: #fff; }

.os-section-title {
    font-size: 1.1rem; font-weight: 800;
    letter-spacing: -.02em; margin-bottom: 1rem;
}

.os-steps {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
    margin-bottom: 2.5rem;
}
@media (max-width: 700px) { .os-steps { grid-template-columns: 1fr; } }
.os-step {
    padding: 1.3rem 1.35rem;
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius-lg); box-shadow: var(--shadow);
}
.os-step-num {
    width: 28px; height: 28px; border-radius: 8px;
    background: var(--accent-soft); color: var(--accent);
    display: grid; place-items: center;
    font-family: 'Outfit', sans-serif; font-weight: 800;
    font-size: .8rem; margin-bottom: .65rem;
}
.os-step h4 { font-size: .9rem; font-weight: 700; margin-bottom: .35rem; }
.os-step p { font-size: .82rem; color: var(--muted); line-height: 1.55; margin: 0; }

.os-where {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem;
    margin-bottom: 2.5rem;
}
@media (max-width: 600px) { .os-where { grid-template-columns: 1fr; } }
.os-where-card {
    padding: 1.2rem 1.3rem;
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius);
}
.os-where-card h4 { font-size: .88rem; font-weight: 700; margin-bottom: .4rem; }
.os-where-card p { font-size: .84rem; color: var(--muted); line-height: 1.55; margin: 0; }

.os-compare {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem;
    margin-bottom: 2.5rem;
}
@media (max-width: 600px) { .os-compare { grid-template-columns: 1fr; } }
.os-compare-card {
    padding: 1.25rem 1.35rem;
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius-lg);
}
.os-compare-card h4 {
    font-size: .92rem; font-weight: 800; margin-bottom: .5rem;
}
.os-compare-card ul {
    margin: 0; padding: 0; list-style: none;
}
.os-compare-card li {
    font-size: .84rem; color: var(--muted);
    padding: .35rem 0 .35rem 1.1rem; position: relative; line-height: 1.5;
}
.os-compare-card li::before {
    content: '•'; position: absolute; left: 0; color: var(--accent); font-weight: 800;
}

.os-tips {
    display: flex; flex-direction: column; gap: .65rem;
    margin-bottom: 2.5rem;
}
.os-tip {
    display: flex; gap: .75rem; align-items: flex-start;
    padding: 1rem 1.15rem;
    background: var(--surface-2); border: 1px solid var(--line);
    border-radius: var(--radius); font-size: .86rem; line-height: 1.55;
}
.os-tip::before {
    content: 'i'; width: 22px; height: 22px; border-radius: 50%;
    background: var(--accent-soft); color: var(--accent);
    display: grid; place-items: center;
    font-size: .72rem; font-weight: 800; flex-shrink: 0;
}
.os-tip a { color: var(--accent); }

.os-faq { display: flex; flex-direction: column; gap: .65rem; }
.os-faq-item {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); overflow: hidden;
}
.os-faq-q {
    width: 100%; display: flex; justify-content: space-between; align-items: center;
    gap: 1rem; padding: 1rem 1.15rem; border: none; background: transparent;
    text-align: left; font: inherit; font-size: .92rem; font-weight: 600;
    cursor: pointer;
}
.os-faq-q:hover { background: var(--surface-2); }
.os-faq-q svg { flex-shrink: 0; transition: transform .25s; color: var(--muted); }
.os-faq-item.open .os-faq-q svg { transform: rotate(180deg); }
.os-faq-a {
    display: none; padding: 0 1.15rem 1rem;
    font-size: .88rem; color: var(--muted); line-height: 1.65;
}
.os-faq-item.open .os-faq-a { display: block; }
.os-faq-a a { color: var(--accent); }

.os-sidebar { position: sticky; top: 5.5rem; }
@media (max-width: 1024px) { .os-sidebar { position: static; order: -1; } }
.os-side-card {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 1.25rem;
    margin-bottom: 1rem; box-shadow: var(--shadow);
}
.os-side-card h3 {
    font-size: .72rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .1em;
    color: var(--accent); margin-bottom: .85rem;
}
.os-side-links { display: flex; flex-direction: column; gap: .4rem; }
.os-side-links a {
    font-size: .86rem; color: var(--muted); text-decoration: none;
}
.os-side-links a:hover { color: var(--accent); }
.os-side-cta {
    background: linear-gradient(135deg, var(--ink), #1a2820);
    border: none; color: #fff; text-align: center;
}
.os-side-cta p {
    font-size: .84rem; color: rgba(255,255,255,.6);
    margin: .45rem 0 1rem; line-height: 1.55;
}
.os-side-cta .btn {
    display: inline-flex; padding: .65rem 1.15rem;
    border-radius: 999px; background: var(--accent);
    color: #272824; text-decoration: none; font-weight: 600;
    font-size: .84rem;
}